/****************************************************************************
*  Copyright 2017 Gorgon Meducer (Email:embedded_zhuoran@hotmail.com)       *
*                                                                           *
*  Licensed under the Apache License, Version 2.0 (the "License");          *
*  you may not use this file except in compliance with the License.         *
*  You may obtain a copy of the License at                                  *
*                                                                           *
*     http://www.apache.org/licenses/LICENSE-2.0                            *
*                                                                           *
*  Unless required by applicable law or agreed to in writing, software      *
*  distributed under the License is distributed on an "AS IS" BASIS,        *
*  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
*  See the License for the specific language governing permissions and      *
*  limitations under the License.                                           *
*                                                                           *
****************************************************************************/

/*============================ INCLUDES ======================================*/
#include ".\app_cfg.h"

/*============================ MACROS ========================================*/
#define CRC32_IEEE802_3_POLY    (0x04C11DB7)
#define CRC32_POLY              (0x04C11DB7)

/*============================ MACROFIED FUNCTIONS ===========================*/
/*============================ TYPES =========================================*/
/*============================ PROTOTYPES ====================================*/
/*============================ GLOBAL VARIABLES ==============================*/
/*============================ LOCAL VARIABLES ===============================*/
#if CRC32_IEEE802_3_OPTIMIZE == CRC_OPT_SPEED
//! CRC32 IEEE802_3  polynomial table  
static const uint32_t c_wCRC32IEEE802_3Table[256] = {
    0x00000000, 0x04C11DB7, 0x09823B6E, 0x0D4326D9, 0x130476DC, 0x17C56B6B,
    0x1A864DB2, 0x1E475005, 0x2608EDB8, 0x22C9F00F, 0x2F8AD6D6, 0x2B4BCB61, 
    0x350C9B64, 0x31CD86D3, 0x3C8EA00A, 0x384FBDBD, 0x4C11DB70, 0x48D0C6C7, 
    0x4593E01E, 0x4152FDA9, 0x5F15ADAC, 0x5BD4B01B, 0x569796C2, 0x52568B75, 
    0x6A1936C8, 0x6ED82B7F, 0x639B0DA6, 0x675A1011, 0x791D4014, 0x7DDC5DA3,
    0x709F7B7A, 0x745E66CD, 0x9823B6E0, 0x9CE2AB57, 0x91A18D8E, 0x95609039,
    0x8B27C03C, 0x8FE6DD8B, 0x82A5FB52, 0x8664E6E5, 0xBE2B5B58, 0xBAEA46EF, 
    0xB7A96036, 0xB3687D81, 0xAD2F2D84, 0xA9EE3033, 0xA4AD16EA, 0xA06C0B5D, 
    0xD4326D90, 0xD0F37027, 0xDDB056FE, 0xD9714B49, 0xC7361B4C, 0xC3F706FB,
    0xCEB42022, 0xCA753D95, 0xF23A8028, 0xF6FB9D9F, 0xFBB8BB46, 0xFF79A6F1, 
    0xE13EF6F4, 0xE5FFEB43, 0xE8BCCD9A, 0xEC7DD02D, 0x34867077, 0x30476DC0, 
    0x3D044B19, 0x39C556AE, 0x278206AB, 0x23431B1C, 0x2E003DC5, 0x2AC12072, 
    0x128E9DCF, 0x164F8078, 0x1B0CA6A1, 0x1FCDBB16, 0x018AEB13, 0x054BF6A4, 
    0x0808D07D, 0x0CC9CDCA, 0x7897AB07, 0x7C56B6B0, 0x71159069, 0x75D48DDE,
    0x6B93DDDB, 0x6F52C06C, 0x6211E6B5, 0x66D0FB02, 0x5E9F46BF, 0x5A5E5B08,
    0x571D7DD1, 0x53DC6066, 0x4D9B3063, 0x495A2DD4, 0x44190B0D, 0x40D816BA, 
    0xACA5C697, 0xA864DB20, 0xA527FDF9, 0xA1E6E04E, 0xBFA1B04B, 0xBB60ADFC, 
    0xB6238B25, 0xB2E29692, 0x8AAD2B2F, 0x8E6C3698, 0x832F1041, 0x87EE0DF6, 
    0x99A95DF3, 0x9D684044, 0x902B669D, 0x94EA7B2A, 0xE0B41DE7, 0xE4750050, 
    0xE9362689, 0xEDF73B3E, 0xF3B06B3B, 0xF771768C, 0xFA325055, 0xFEF34DE2, 
    0xC6BCF05F, 0xC27DEDE8, 0xCF3ECB31, 0xCBFFD686, 0xD5B88683, 0xD1799B34,
    0xDC3ABDED, 0xD8FBA05A, 0x690CE0EE, 0x6DCDFD59, 0x608EDB80, 0x644FC637,
    0x7A089632, 0x7EC98B85, 0x738AAD5C, 0x774BB0EB, 0x4F040D56, 0x4BC510E1, 
    0x46863638, 0x42472B8F, 0x5C007B8A, 0x58C1663D, 0x558240E4, 0x51435D53, 
    0x251D3B9E, 0x21DC2629, 0x2C9F00F0, 0x285E1D47, 0x36194D42, 0x32D850F5,
    0x3F9B762C, 0x3B5A6B9B, 0x0315D626, 0x07D4CB91, 0x0A97ED48, 0x0E56F0FF,
    0x1011A0FA, 0x14D0BD4D, 0x19939B94, 0x1D528623, 0xF12F560E, 0xF5EE4BB9, 
    0xF8AD6D60, 0xFC6C70D7, 0xE22B20D2, 0xE6EA3D65, 0xEBA91BBC, 0xEF68060B, 
    0xD727BBB6, 0xD3E6A601, 0xDEA580D8, 0xDA649D6F, 0xC423CD6A, 0xC0E2D0DD, 
    0xCDA1F604, 0xC960EBB3, 0xBD3E8D7E, 0xB9FF90C9, 0xB4BCB610, 0xB07DABA7, 
    0xAE3AFBA2, 0xAAFBE615, 0xA7B8C0CC, 0xA379DD7B, 0x9B3660C6, 0x9FF77D71, 
    0x92B45BA8, 0x9675461F, 0x8832161A, 0x8CF30BAD, 0x81B02D74, 0x857130C3, 
    0x5D8A9099, 0x594B8D2E, 0x5408ABF7, 0x50C9B640, 0x4E8EE645, 0x4A4FFBF2,
    0x470CDD2B, 0x43CDC09C, 0x7B827D21, 0x7F436096, 0x7200464F, 0x76C15BF8, 
    0x68860BFD, 0x6C47164A, 0x61043093, 0x65C52D24, 0x119B4BE9, 0x155A565E,
    0x18197087, 0x1CD86D30, 0x029F3D35, 0x065E2082, 0x0B1D065B, 0x0FDC1BEC, 
    0x3793A651, 0x3352BBE6, 0x3E119D3F, 0x3AD08088, 0x2497D08D, 0x2056CD3A,
    0x2D15EBE3, 0x29D4F654, 0xC5A92679, 0xC1683BCE, 0xCC2B1D17, 0xC8EA00A0,
    0xD6AD50A5, 0xD26C4D12, 0xDF2F6BCB, 0xDBEE767C, 0xE3A1CBC1, 0xE760D676,
    0xEA23F0AF, 0xEEE2ED18, 0xF0A5BD1D, 0xF464A0AA, 0xF9278673, 0xFDE69BC4, 
    0x89B8FD09, 0x8D79E0BE, 0x803AC667, 0x84FBDBD0, 0x9ABC8BD5, 0x9E7D9662, 
    0x933EB0BB, 0x97FFAD0C, 0xAFB010B1, 0xAB710D06, 0xA6322BDF, 0xA2F33668,
    0xBCB4666D, 0xB8757BDA, 0xB5365D03, 0xB1F740B4, 
};
#endif

#if CRC32_IEEE802_3_OPTIMIZE == CRC_OPT_BALANCE
//! CRC32 IEEE802_3  polynomial table(half of  byte)  
static const uint32_t c_wCRC32IEEE802_3Table[16] = {
    0x00000000, 0x04C11DB7, 0x09823B6E, 0x0D4326D9,
    0x130476DC, 0x17C56B6B, 0x1A864DB2, 0x1E475005,
    0x2608EDB8, 0x22C9F00F, 0x2F8AD6D6, 0x2B4BCB61, 
    0x350C9B64, 0x31CD86D3, 0x3C8EA00A, 0x384FBDBD, 
};
#endif

#if CRC32_OPTIMIZE == CRC_OPT_SPEED
//! CRC32  polynomial table  
static const uint32_t c_wCRC32Table[256] = {
    0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F,
    0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
    0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2,
    0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
    0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9,
    0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
    0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C,
    0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
    0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423,
    0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
    0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106,
    0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
    0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D,
    0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
    0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950,
    0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
    0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7,
    0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
    0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA,
    0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
    0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81,
    0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
    0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84,
    0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
    0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB,
    0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
    0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E,
    0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
    0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55,
    0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
    0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28,
    0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
    0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F,
    0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
    0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242,
    0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
    0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69,
    0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
    0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC,
    0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
    0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693,
    0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
    0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D,
};
#endif

#if CRC32_OPTIMIZE == CRC_OPT_BALANCE
//! CRC32  polynomial table(half of  byte)    
static const uint32_t c_wCRC32Table[16] = {
    0x00000000, 0x1DB71064, 0x3B6E20C8, 0x26D930AC, 
    0x76DC4190, 0x6B6B51F4, 0x4DB26158, 0x5005713C, 
    0xEDB88320, 0xF00F9344, 0xD6D6A3E8, 0xCB61B38C, 
    0x9B64C2B0, 0x86D3D2D4, 0xA00AE278, 0xBDBDF21C,
};
#endif


/*============================ IMPLEMENTATION ================================*/
#if CRC32_IEEE802_3_OPTIMIZE == CRC_OPT_SIZE
/*! \brief CRC32 IEEE802.3
 *!        Poly: 0x04C11DB7
 *!        Init: 0xFFFFFFFF
 *!        RefIn: False
 *!        RefOut: False
 *!        XorOut: 0x00000000
 *! \param pwCRCValue CRC Variable
 *! \param pchData target data stream address
 *! \param wLength the number of target data stream
 *! \return CRC32 result
 */
uint32_t crc32_ieee802_3_stream_check(uint32_t *pwCRCValue, uint8_t *pchData, uint32_t wLength)
{
    uint32_t i,j;
    uint32_t wCRC32 = 0;

    if ((NULL == pwCRCValue) || (NULL == pchData)) {
        return false;
    }

    for (i = 0; i < wLength; i++) {
        wCRC32 = ((uint32_t)(*pchData++) << 24) ^ (*pwCRCValue & 0xFF000000);
        for (j = 0; j < 8; j++) {
            if (wCRC32 & 0x80000000) {
                wCRC32 <<= 1;
                wCRC32 ^= CRC32_IEEE802_3_POLY;
            } else {
                wCRC32 <<= 1;
            }
        }
        *pwCRCValue = (*pwCRCValue << 8) ^ wCRC32;
    }

    return *pwCRCValue;
}


/*! \brief CRC32 IEEE802.3
 *!        Poly: 0x04C11DB7
 *!        Init: 0xFFFFFFFF
 *!        RefIn: False
 *!        RefOut: False
 *!        XorOut: 0x00000000
 *! \param pwCRCValue CRC Variable
 *! \param pchData target data byte
 *! \return CRC32 result
 */
uint32_t crc32_ieee802_3_check(uint32_t *pwCRCValue, uint8_t chData)
{
    uint32_t i;
    uint32_t wCRC32 = 0;

    if (NULL == pwCRCValue) {
        return false;
    }

    wCRC32 = ((uint32_t)chData << 24) ^ (*pwCRCValue & 0xFF000000);
    for (i = 0; i < 8; i++) {
        if (wCRC32 & 0x80000000) {
            wCRC32 <<= 1;
            wCRC32 ^= CRC32_IEEE802_3_POLY;
        } else {
            wCRC32 <<= 1;
        }
    }
    *pwCRCValue = (*pwCRCValue << 8) ^ wCRC32;
    
    return *pwCRCValue;
}
#endif


#if CRC32_IEEE802_3_OPTIMIZE == CRC_OPT_BALANCE
/*! \brief CRC32 IEEE802.3
 *!        Poly: 0x04C11DB7
 *!        Init: 0xFFFFFFFF
 *!        RefIn: False
 *!        RefOut: False
 *!        XorOut: 0x00000000
 *! \param pwCRCValue CRC Variable
 *! \param pchData target data stream address
 *! \param wLength the number of target data stream
 *! \return CRC32 result
 */
uint32_t crc32_ieee802_3_stream_check(uint32_t *pwCRCValue, uint8_t *pchData, uint32_t wLength)
{
    uint32_t i;
    uint32_t wCRC32 = 0;

    if ((NULL == pwCRCValue) || (NULL == pchData)) {
        return false;
    }
    
    wCRC32 = *pwCRCValue;
    for (i = 0; i < wLength; i++) {
        wCRC32 = (wCRC32 << 4) ^ c_wCRC32IEEE802_3Table[(wCRC32 >> 28) ^ (*pchData >> 4)];
        wCRC32 = (wCRC32 << 4) ^ c_wCRC32IEEE802_3Table[(wCRC32 >> 28) ^ (*pchData++ & 0x0F)];
    }

    return (*pwCRCValue = wCRC32);
} 


/*! \brief CRC32 IEEE802.3
 *!        Poly: 0x04C11DB7
 *!        Init: 0xFFFFFFFF
 *!        RefIn: False
 *!        RefOut: False
 *!        XorOut: 0x00000000
 *! \param pwCRCValue CRC Variable
 *! \param pchData target data stream address
 *! \return CRC32 result
 */
uint32_t crc32_ieee802_3_check(uint32_t *pwCRCValue, uint8_t chData)
{
    uint32_t wCRC32 = 0;

    if (NULL == pwCRCValue) {
        return false;
    }
    
    wCRC32 = *pwCRCValue;
    wCRC32 = (wCRC32 << 4) ^ c_wCRC32IEEE802_3Table[(wCRC32 >> 28) ^ (chData >> 4)];
    wCRC32 = (wCRC32 << 4) ^ c_wCRC32IEEE802_3Table[(wCRC32 >> 28) ^ (chData & 0x0F)];

    return (*pwCRCValue = wCRC32);
} 
#endif


#if CRC32_IEEE802_3_OPTIMIZE == CRC_OPT_SPEED
/*! \brief CRC32 IEEE802.3
 *!        Poly: 0x04C11DB7
 *!        Init: 0xFFFFFFFF
 *!        RefIn: False
 *!        RefOut: False
 *!        XorOut: 0x00000000
 *! \param pwCRCValue CRC Variable
 *! \param pchData target data stream address
 *! \param wLength the number of target data stream
 *! \return CRC32 result
 */
uint32_t crc32_ieee802_3_stream_check(uint32_t *pwCRCValue, uint8_t *pchData, uint32_t wLength)
{
    uint32_t i;
    uint32_t wCRC32;

    if ((NULL == pwCRCValue) || (NULL == pchData)) {
        return false;
    }

    wCRC32 = *pwCRCValue;
    for (i = 0; i < wLength; i++) {
        wCRC32 = (wCRC32 << 8) ^ c_wCRC32IEEE802_3Table[(wCRC32 >> 24) ^ *pchData++];
    }

    return (*pwCRCValue = wCRC32);

}  


/*! \brief CRC32 IEEE802.3
 *!        Poly: 0x04C11DB7
 *!        Init: 0xFFFFFFFF
 *!        RefIn: False
 *!        RefOut: False
 *!        XorOut: 0x00000000
 *! \param pwCRCValue CRC Variable
 *! \param pchData target data
 *! \return CRC32 result
 */
uint32_t crc32_ieee802_3_check(uint32_t *pwCRCValue, uint8_t chData)
{
    uint32_t wCRC32;

    if (NULL == pwCRCValue) {
        return false;
    }

    wCRC32 = *pwCRCValue;
    wCRC32 = (wCRC32 << 8) ^ c_wCRC32IEEE802_3Table[(wCRC32 >> 24) ^ chData];

    return (*pwCRCValue = wCRC32);

}
#endif


#if CRC32_OPTIMIZE == CRC_OPT_SPEED
/*! \brief CRC32 
 *!        Poly: 0x04C11DB7
 *!        Init: 0xFFFFFFFF
 *!        RefIn: True
 *!        RefOut: True
 *!        XorOut: 0xFFFFFFFF
 *! \param pwCRCValue CRC Variable
 *! \param pchData target data stream address
 *! \param wLength the number of target data stream
 *! \return CRC32 result
 */
uint32_t crc32_stream_check(uint32_t *pwCRCValue, uint8_t *pchData, uint32_t wLength)
{
    uint32_t i;
    uint32_t wCRC32;

    if ((NULL == pwCRCValue) || (NULL == pchData)) {
        return false;
    }

    wCRC32 = *pwCRCValue;
    for (i = 0; i < wLength; i++) {
        wCRC32 = (wCRC32 >> 8) ^ c_wCRC32Table[(wCRC32 ^ *pchData++) & 0xFF];
    }

    return (*pwCRCValue = ~wCRC32);

}  


/*! \brief CRC32 
 *!        Poly: 0x04C11DB7
 *!        Init: 0xFFFFFFFF
 *!        RefIn: True
 *!        RefOut: True
 *!        XorOut: 0xFFFFFFFF
 *! \param pwCRCValue CRC Variable
 *! \param pchData target data byte
 *! \return CRC32 result
 */
uint32_t crc32_check(uint32_t *pwCRCValue, uint8_t chData)
{
    uint32_t wCRC32;

    if (NULL == pwCRCValue) {
        return false;
    }

    wCRC32 = *pwCRCValue;
    wCRC32 = (wCRC32 >> 8) ^ c_wCRC32Table[(wCRC32 ^ chData) & 0xFF];

    return (*pwCRCValue = wCRC32);
}
#endif


#if CRC32_OPTIMIZE == CRC_OPT_BALANCE
/*! \brief CRC32 
 *!        Poly: 0x04C11DB7
 *!        Init: 0xFFFFFFFF
 *!        RefIn: True
 *!        RefOut: True
 *!        XorOut: 0xFFFFFFFF
 *! \param pwCRCValue CRC Variable
 *! \param pchData target data stream address
 *! \param wLength the number of target data stream
 *! \return CRC32 result
 */
uint32_t crc32_stream_check(uint32_t *pwCRCValue, uint8_t *pchData, uint32_t wLength)
{
    uint32_t i;
    uint32_t wCRC32;

    if ((NULL == pwCRCValue) || (NULL == pchData)) {
        return false;
    }

    wCRC32 = *pwCRCValue;
    for (i = 0; i < wLength; i++) {
        wCRC32 = (wCRC32 >> 4) ^ c_wCRC32Table[(wCRC32 & 0x0000000F) ^ (*pchData & 0x0F)];
        wCRC32 = (wCRC32 >> 4) ^ c_wCRC32Table[(wCRC32 & 0x0000000F) ^ (*pchData++ >> 4)];
    }

    return (*pwCRCValue = ~wCRC32);
}  


/*! \brief CRC32 
 *!        Poly: 0x04C11DB7
 *!        Init: 0xFFFFFFFF
 *!        RefIn: True
 *!        RefOut: True
 *!        XorOut: 0xFFFFFFFF
 *! \param pwCRCValue CRC Variable
 *! \param pchData target data byte
 *! \return CRC32 result
 */
uint32_t crc32_check(uint32_t *pwCRCValue, uint8_t chData)
{
    uint32_t wCRC32;

    if (NULL == pwCRCValue) {
        return false;
    }

    wCRC32 = *pwCRCValue;
    wCRC32 = (wCRC32 >> 4) ^ c_wCRC32Table[(wCRC32 & 0x0000000F) ^ (chData & 0x0F)];
    wCRC32 = (wCRC32 >> 4) ^ c_wCRC32Table[(wCRC32 & 0x0000000F) ^ (chData >> 4)];
   
    return (*pwCRCValue = wCRC32);
}
#endif


#if CRC32_OPTIMIZE == CRC_OPT_SIZE
/*! \brief data reversal
 *! \param wValue need to reversal data
 *! \param chLength data bit length
 *! \return already reversal data
 */
static uint32_t data_reversal(uint32_t wValue, uint8_t chLength)
{
    uint8_t i;
    uint32_t wTempValue = 0;

    for (i = 1; i < (chLength + 1); i++) {
        if (wValue & 0x01) {
            wTempValue |= ((uint32_t)1 << (chLength - i));
        }
        wValue >>= 1;
    }

    return wTempValue;
}


/*! \brief CRC32
 *!        Poly: 0x04C11DB7
 *!        Init: 0xFFFFFFFF
 *!        RefIn: True
 *!        RefOut: True
 *!        XorOut: 0xFFFFFFFF
 *! \param pwCRCValue CRC Variable
 *! \param pchData target data stream address
 *! \param wLength the number of target data stream
 *! \return CRC32 result
 */
uint32_t crc32_stream_check(uint32_t *pwCRCValue, uint8_t *pchData, uint32_t wLength)
{
    uint32_t i,j;
    uint32_t wCRC32 = 0;

    if ((NULL == pwCRCValue) || (NULL == pchData)) {
        return false;
    }

    for (i = 0; i < wLength; i++) {
        wCRC32 = ((*pwCRCValue) ^ (*pchData++)) & 0x000000FF;        
        wCRC32 = data_reversal(wCRC32, 32);
        for (j = 0; j < 8; j++) {
            if (wCRC32 & 0x80000000) {
                wCRC32 <<= 1;
                wCRC32 ^= CRC32_POLY;
            } else {
                wCRC32 <<= 1;
            }
        }
        wCRC32 = data_reversal(wCRC32, 32);
        *pwCRCValue = (*pwCRCValue >> 8) ^ wCRC32;
    }


    return (*pwCRCValue = ~*pwCRCValue);
}


/*! \brief CRC32 
 *!        Poly: 0x04C11DB7
 *!        Init: 0xFFFFFFFF
 *!        RefIn: True
 *!        RefOut: True
 *!        XorOut: 0xFFFFFFFF
 *! \param pwCRCValue CRC Variable
 *! \param pchData target data byte
 *! \return CRC32 result
 */
uint32_t crc32_check(uint32_t *pwCRCValue, uint8_t chData)
{
    uint32_t i;
    uint32_t wCRC32 = 0;

    if (NULL == pwCRCValue) {
        return false;
    }

    wCRC32 = ((*pwCRCValue) ^ chData) & 0x000000FF;        
    wCRC32 = data_reversal(wCRC32, 32);
    for (i = 0; i < 8; i++) {
        if (wCRC32 & 0x80000000) {
            wCRC32 <<= 1;
            wCRC32 ^= CRC32_POLY;
        } else {
            wCRC32 <<= 1;
        }
    }
    wCRC32 = data_reversal(wCRC32, 32);
    *pwCRCValue = (*pwCRCValue >> 8) ^ wCRC32;

    return (*pwCRCValue);
}
#endif
/* EOF */
